Package Quantity : 2 Pcs Titanium Bolt Size : M5X14.5 mm ; Thread Diameter : M5 ; Bolt Length : 14.5 mm Weight : About 1.2g/Pcs ; Drive System : Internal Hex Material : Made Of Durable And Anti Corrosion TC4 Titanium Alloy Grade 5 Titanium Bolt : Strong And Durable ; Finely Crafted And Polished With Stunning Color ; Make Our Bikes More Beautiful Bicycle Rear Derailleur Titanium Bolt is Made of durable and anti-corrosion 6AL/4V(TC4)Titanium Alloy, strong and durable metal,Grade 5. Finely crafted and polished with stunning color, Make our bikes more beautiful